htaccess: how to redirect all pages to a holding page

Question

I have to put a site down for about half an hour while we put a second server in place. Using .htaccess, how can I redirect ANY request to domain.com to d

Answer 1

Options +FollowSymlinks
RewriteEngine on
RewriteCond %{REQUEST_URI} !/holding_page.php$ 

RewriteRule $ /holding_page.php$l [R=307,L]

Use 307 (thanks Piskvor!) rather than 302 - 307 means:

The requested resource resides temporarily under a different URI. Since the redirection MAY be altered on occasion, the client SHOULD continue to use the Request-URI for future requests.